Effect of electric field-assisted diffusion on surface layer structure and mechanical properties of soda-lime glasses

Abstract

Soda-lime glasses were treated by electric field-assisted diffusion (EFAD) process. The mechanical properties and structural evolution on both glass anode and cathode surfaces were investigated, respectively. It was found that the EFAD resulted in the formation of a Na depletion layer on anode surface, which caused the relaxation of the glass anode surface network and the formation of a number of defects. Correspondingly, the hardness and flexural strength declined in anode surface compared to that of the original glass. On the other hand, the EFAD also created a compressive layer on cathode surface, causing the improvement of the hardness and flexural strength on cathode surface. The defected structure could be reconstructed by additional annealing process.

Keywords

electric field-assisted diffusion / annealing / surface layer / mechanical properties

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